package com.x.core.utils;

import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

public class ThreadPoolUtil {
    public static Executor createExecutor(String threadName){
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //此方法返回可用处理器的虚拟机的最大数量; 不小于1
        int core = Runtime.getRuntime().availableProcessors();
        executor.setCorePoolSize(core);//设置核心线程数
        executor.setMaxPoolSize(core*2 + 1);//设置最大线程数
        executor.setKeepAliveSeconds(3);//除核心线程外的线程存活时间
        executor.setQueueCapacity(40);//如果传入值大于0，底层队列使用的是LinkedBlockingQueue,否则默认使用SynchronousQueue
        executor.setThreadNamePrefix(threadName);//线程名称前缀
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());//设置拒绝策略
        return executor;
    }
}
